Release: BwE PS4 NOR Statistics

Recommended Posts

Hello! Following my this program BwE PS4 NOR Statistics v1.00, another micro version of my PS4 NOR Validator, is designed solely to validate your NOR based on statistics only from Better Way Electronics!

Why make this you ask? Entropy and statistics are a well used methodology in the malware analysis field to determine if a binary file is encrypted, and by how much.

What is entropy? Entropy is a method for measuring uncertainty in a series of numbers or bytes. In technical terms, entropy measures the level of difficulty or the probability of independently predicting each number in the series.

What has this got to do with PS4s? Well the PS4's NOR is almost entirely encrypted and so with a collection of known valid NOR's it is possible to determine the level of entropy that represents a valid NOR and what level of entropy would represent a corrupt NOR.

When corruption occurs it will generally wipe out a large chuck of the NOR, cause the NOR to repeat itself or will fill the NOR with junk. All of this will decrease or severely increase the entropy.

Seeing as the PS4 firmware is likely to add more or less complexity with each update I have made available a settings file where you can adjust the predicted statistics.

Share this post

Link to post

Share on other sites

Hello,
to start thanks for those programs that are great.
I have several corrupt ps4 nor in the unk file or whatever.
Do you know what is repairable or not ?
I enclose a screenshot of a SAB with the original default of ram (elpida) replace with samsung and always blod.
After checking the nor it misses 4 lines in the unk.
Do you know if the problem could come from there, which I believe.

Share this post

Link to post

Share on other sites

I also have a SAA with corrupted nor (that's for sure) because the firmware is in danger and when I try to make an installation I have an error SU-39176-6.
It does not come from the motherboard because I graft a kit (apu, nor, syscon and ram) on this same card and it works perfectly.
I have not been able to repair the nor despite several attempts.I can provide the original saa file if you want.

After checking on a second SAB with exactly the same problem (blod remaining even after replacing the ram) I have corruption in the same place in the unk.
So I'm sure it's these 4 missing lines that are problematic.